[Single] OP06-100 (PRB01) Inuarashi (Jolly Roger Foil)

[DON!! x2][When Attacking] You may trash 1 card from your hand: K.O. up to 1 of your opponent's Characters with a cost equal to or less than the number of your opponent's Life cards.
[Trigger] If your opponent has 3 or less Life cards, play this card.